Charts advanced usage

Bootstrap 5 Charts advanced usage

This documentation provides examples of advanced chart usage.

Note: Read the API tab in the basic chart docs to find all available options and advanced customization


Options

In most cases, working with advanced charts is related to the handling of options.

MDB provides default options for each chart - you can easily change that by passing an object with your custom options to the Chart constructor.


          <canvas
            mdbChart
            [type]="'bar'"
            [datasets]="datasets"
            [labels]="labels"
            [options]="options"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              {
                label: 'Traffic',
                data: [30, 15, 62, 65, 61, 6],
                backgroundColor: [
                  'rgba(255, 99, 132, 0.2)',
                  'rgba(54, 162, 235, 0.2)',
                  'rgba(255, 206, 86, 0.2)',
                  'rgba(75, 192, 192, 0.2)',
                  'rgba(153, 102, 255, 0.2)',
                  'rgba(255, 159, 64, 0.2)',
                ],
                borderColor: [
                  'rgba(255,99,132,1)',
                  'rgba(54, 162, 235, 1)',
                  'rgba(255, 206, 86, 1)',
                  'rgba(75, 192, 192, 1)',
                  'rgba(153, 102, 255, 1)',
                  'rgba(255, 159, 64, 1)',
                ],
                borderWidth: 1,
              },
            ];

            labels = ['January', 'February', 'March', 'April', 'May', 'June'];

            options = {
              scales: {
                x: {
                  ticks: {
                    color: '#4285F4',
                  },
                },
                y: {
                  ticks: {
                    color: '#f44242',
                  },
                },
              },
            };
          }
        

Mixed

With MDB it is possible to create mixed charts that are a combination of two or more different chart types. A common example is a bar chart that also includes a line dataset.


          <canvas
            mdbChart
            [type]="'bar'"
            [datasets]="datasets"
            [labels]="labels"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              // First dataset (bar)
              {
                label: 'Impressions',
                data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
                order: 2,
              },
              // Second dataset (line)
              {
                label: 'Impressions (absolute top) %',
                data: [211, 2543, 2745, 3123, 2765, 1485, 587],
                type: 'line',
                order: 1,
                backgroundColor: 'rgba(66, 133, 244, 0.0)',
                borderColor: '#94DFD7',
                borderWidth: 2,
                pointBorderColor: '#94DFD7',
                pointBackgroundColor: '#94DFD7',
                lineTension: 0.0,
              },
            ];

            labels = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];
          }
        

Data labels

Use datalabels plugin to display values directly on a graph.


          <canvas
            mdbChart
            [type]="'pie'"
            [datasets]="datasets"
            [labels]="labels"
            [options]="options"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              {
                label: 'Traffic',
                data: [30, 45, 62, 65, 61],
                backgroundColor: [
                  'rgba(63, 81, 181, 0.5)',
                  'rgba(77, 182, 172, 0.5)',
                  'rgba(66, 133, 244, 0.5)',
                  'rgba(156, 39, 176, 0.5)',
                  'rgba(233, 30, 99, 0.5)',
                ],
              },
            ];

            labels = ['January', 'February', 'March', 'April', 'May'];

            options = {
              plugins: {
                datalabels: {
                  formatter: (value) => {
                    let sum = 0;
                    // Assign the data to the variable and format it according to your needs
                    let dataArr = this.dataLabelsDatasets[0].data;
                    dataArr.map((data) => {
                      sum += data;
                    });
                    let percentage = ((value * 100) / sum).toFixed(2) + '%';
                    return percentage;
                  },
                  color: 'white',
                  labels: {
                    title: {
                      font: {
                        size: '14',
                      },
                    },
                  },
                },
              },
            };
          }
        

Double Y axis

In the example below we created chart with double Y axis with 2 datasets, each one with completely different data range.

Such a construction requires a scale adjustment, so the left axis is assigned and adjusted to the first dataset, and the right axis to the second dataset.


          <canvas
            mdbChart
            [type]="'bar'"
            [datasets]="datasets"
            [labels]="labels"
            [options]="options"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              {
                label: 'Impressions',
                data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
                order: 1,
                yAxisID: 'y',
              },
              {
                label: 'Impressions (absolute top) %',
                yAxisID: 'y2',
                data: [1.5, 2, 0.5, 3, 1.2, 4, 3.4],
                type: 'line',
                order: 0,
                backgroundColor: 'rgba(66, 133, 244, 0.0)',
                borderColor: '#94DFD7',
                borderWidth: 2,
                pointBorderColor: '#94DFD7',
                pointBackgroundColor: '#94DFD7',
                lineTension: 0.0,
              },
            ];

            labels = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];

            options = {
              scales: {
                y1: {
                  stacked: false,
                  position: 'left',
                  grid: {
                    drawOnChartArea: false,
                    drawBorder: false,
                    drawTicks: false,
                  },
                  ticks: {
                    display: false,
                  },
                },
                y2: {
                  stacked: false,
                  position: 'right',
                  grid: {
                    drawOnChartArea: false,
                  },
                  ticks: {
                    beginAtZero: true,
                  },
                },
              },
            };
          }
        

Funnel

Example of horizontal bar chart with custom options and labels formatting (calculating integers numbers into percentages).

This data visualization is often used to visualize the flow of the website traffic.


          <canvas
            mdbChart
            [type]="'bar'"
            [datasets]="datasets"
            [labels]="labels"
            [options]="options"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              {
                data: [2112, 343, 45],
                barPercentage: 1.24,
              },
            ];

            labels = ['Product views', 'Checkout', 'Purchases'];

            options = {
              indexAxis: 'y',
              scales: {
                x: {
                  gridLines: {
                    offsetGridLines: true,
                  },
                },
              },
              plugins: {
                legend: {
                  display: false,
                },
                datalabels: {
                  formatter: (value) => {
                    let sum = 0;
                    let dataArr = this.funnelDatasets[0].data;
                    dataArr.map((data) => {
                      sum += data;
                    });
                    let percentage = ((value * 100) / sum).toFixed(2) + '%';
                    return percentage;
                  },
                  color: '#4f4f4f',
                  labels: {
                    title: {
                      font: {
                        size: '13',
                      },
                      anchor: 'end',
                      align: 'right',
                    },
                  },
                },
              },
            };
          }
        

Formatting values on the Y axes

In the example below we simply add "$" before each value on the Y axis.


          <canvas
            mdbChart
            [type]="'bar'"
            [datasets]="datasets"
            [labels]="labels"
            [options]="options"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              {
                label: 'Sales',
                data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
              },
            ];

            labels = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];

            options = {
              scales: {
                y: {
                  ticks: {
                    callback: function (value) {
                      return '$' + value;
                    },
                  },
                },
              },
            };
          }
        

Formatting values in the tooltips

In the example below we simply add "$" before each value displayed in the tooltips.

Hover the line of the chart to see the tooltip.


          <canvas
            mdbChart
            [type]="'line'"
            [datasets]="datasets"
            [labels]="labels"
            [options]="options"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              {
                label: 'Sales',
                data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
              },
            ];

            labels = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];

            options = {
              plugins: {
                tooltip: {
                  callbacks: {
                    label: function (value) {
                      return `$ ${value.parsed.y}`;
                    },
                  },
                },
              },
            };
        

Double datasets in a bar chart

Example of the double datasets in a bar chart.


          <canvas
            mdbChart
            [type]="'bar'"
            [datasets]="datasets"
            [labels]="labels"
            [options]="options"
          ></canvas>
        

          import { Component } from '@angular/core';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent {
            datasets = [
              {
                label: 'Users',
                data: [510, 653, 255],
              },
              {
                label: 'Page views',
                data: [1251, 1553, 1355],
                backgroundColor: '#94DFD7',
                borderColor: '#94DFD7',
              },
            ];

            labels = ['Desktop', 'Mobile', 'Tablet'];

            options = {
              scales: {
                y: {
                  stacked: false,
                  ticks: {
                    beginAtZero: true,
                  },
                },
                x: {
                  stacked: false,
                },
              },
            };
        

Async data

Example of the fetching data from the JSON file.


          <canvas
            mdbChart
            [type]="'bar'"
            [datasets]="datasets"
            [labels]="labels"
          ></canvas>
        

          import { Component, OnInit } from '@angular/core';
          import { HttpClient } from '@angular/common/http';

          @Component({
            selector: 'app-charts-advanced',
            templateUrl: './charts-advanced.component.html',
          })
          export class ChartsAdvancedComponent implements OnInit {
            datasets = [];

            labels = [];

            constructor(private http: HttpClient) {}

            ngOnInit(): void {
              this.http
                .get(
                  'https://api.covid19api.com/total/country/poland/status/confirmed?from=2020-10-01T00:00:00Z&to=2020-12-01T00:00:00Z'
                )
                .subscribe((data: any) => {
                  const dataset = data.map((obj) => obj['Cases']);
                  const labels = data.map((obj) => obj['Date'].substr(0, 10));

                  this.labels = [...labels];
                  this.datasets = [
                    {
                      color: '#FFCDD2',
                      data: dataset,
                      label: 'Number of cases',
                      borderColor: dataset.color,
                    },
                  ];
                });
            }